The inflatable boat is a versatile craft that is prized for its compactness and mobility, but often suffers from under-body rigidity when turbulent or under motorized, and it's to solve this problem, and also to protect the cylinders from sharp objects, the owners decide to install stringers. These elements are special profiles that are attached along the side and give the structure additional strength, allowing you to feel more confident on the water.
The process of self-assembly requires care, preparation of materials and strict adherence to gluing technology, since not only the durability of tuning depends on the quality of work, but also the safety of the vessel operation. Incorrectly installed profile It can cause leaks or even break off under load, damaging the main cylinder. In this article, we will discuss all the nuances of the selection of components, surface preparation and the direct process of gluing to make your boat more reliable and comfortable.
Before you start active actions, you need to clearly understand what exactly you are pursuing: protection from reeds, strengthening the keel or creating a rigid foothold. Polyvinyl chloride (PVC)The tyres that are used to make the cylinders require a specific approach and special adhesives, because the usual household adhesives are inefficient here. Proper preparation is half the success, and ignoring this stage will lead to all the work going to be wasted in a season or even earlier.
Choosing material and type of stringers for your boat
The first step in upgrading your vessel is to choose the right profile, and the market offers different options, and it's important not to get confused by choosing exactly what you want for your model. aluminum profilesThese are lightweight and strong, they don't corrosion when properly anodized, but there are plastic options that are cheaper, but they can be less rigid at high loads.
Special attention should be paid to the geometry of the profile section. There are flat, angular and complex curly options. To protect the side from cuts on the rocky bottom or sharp edges of the pier, profiles with a rounded outer radius are optimal. If your goal is to create a rigid ligament between the balloon and the paioles (hard floor), then the choice falls on more massive structures. Metal thickness It also plays a role: too thin a profile can deform on impact, and too thick will add extra weight.
It is important to consider the compatibility of the profile material and the adhesive. Aluminum requires special surface preparation (degreasing and often grounding) to ensure adhesion. Some manufacturers offer profiles already with the applied layer of PVC, which greatly simplifies the task, since gluing is the principle of "PVC to PVC", which is the most reliable connection.
- 🔩 Aluminum stringers: Maximum stiffness, durability, require high-quality surface preparation before gluing.
- 🛡️ PVC-coated profiles: Perfect adhesion with the balloon, no risk of metal oxidation, high reliability of the seam.
- 💰 Plastic analogues: Budget solution, less weight, but limited resistance to mechanical damage and UV radiation.
Essential tools and supplies
The quality of the stringer installation depends on what you use in the process. You can't rely on random materials found in the garage. polyurethaneThe use of universal adhesives or "moments" will cause the seam to dissipate at the first serious tension of the balloon.
In addition to glue, you'll need a solvent to degrease surfaces. acetone It is important that the solvent does not corrode the PVC material itself, so a preliminary test on an inconspicuous area is required, and you will also need brushes for applying glue (preferably hard, synthetic), rollers for rolling the seam and loads or rods to fix the profile during drying.
Don't forget personal protective equipment. Solvent and glue vapors are toxic, so work should be done in a well-ventilated room or outdoors using a respirator. Gloves are also needed to avoid invasive fluids on the skin of the hands.
Use only fresh adhesive components. If the polyurethane glue thickens or crystallizes in the tube, its adhesive properties are already impaired, and a reliable connection will not work.
Surface preparation: a key stage of work
Surface preparation is where most errors are made. Many people think that it's enough to wipe the balloon with a cloth, but it's not enough to fix the stringer reliably. PVC surfaces often have a protective layer or contamination that prevents the glue from entering the material structure. degreasing and, if necessary, light abrasive treatment (if allowed by the glue and PVC type instructions).
The degreasing process should be doubled. First, the surface is wiped with a solvent to remove the main dirt and fat film. Then, after drying, the procedure is repeated with pure rags. Pay special attention to the areas where the seams and attachments of the fittings will pass. If there is an oxide film on the profile (for aluminum), it also needs to be removed mechanically or chemically, according to the technology.
After cleaning, it's important not to touch the prepared surfaces with your hands. Fat marks from your fingers can negate all previous work. If you accidentally touch the gluing site, the degreasing procedure must be repeated. The drying of the surface must occur naturally, without the use of hair dryers, which can leave villi or unevenly warm the material.
⚠️ Attention: Do not use gasoline or kerosene for degreasing. These substances leave a fatty film after evaporation, which dramatically reduces adhesion of the glue. Use only specialized solvents or pure acetone.
Technology of applying glue and installation of profile
The gluing process itself requires a temperature regime and time intervals. Most polyurethane adhesives are activated by applying the adhesive to both surfaces (the balloon and the profile), holding for a certain time to evaporate the solvent, and then connecting the surfaces, and it is important to apply the adhesive evenly, without gaps and excesses that can leak out.
After the first layer is applied and dryed (usually 10-20 minutes, depending on temperature), a second layer is often required. The final connection occurs when the glue stops sticking to the fingers, but retains stickiness. At this point, you need to tightly press the profile against the cylinder and carefully roll from center to edges, expelling air. The pressure should be uniform along the entire length of the stringer.
To fix the profile during the polymerization of the adhesive (which can last from 12 to 24 hours), sandbags, loads or special soft-laid rods are used. You can not allow the profile to shift during this period. If the adhesive is still out, it should be removed immediately until it has frozen, using a rag moistened with solvent.
☑️ Checklist before gluing
What to do if the glue dries too quickly?
In hot weather, the solvent evaporates faster, so you can apply thinner glue to the parts, or work in smaller areas, applying the glue in stages.
Sealing of joints and finishing
Once the primary glue has dried, the sealing stage begins, and even with perfect gluing, there may be microslits on the ends of the profile where sand and moisture will be stuffed. polyurethane sealant Or liquid PVC tape, which is applied in a thin strip along the junction of the profile and the balloon, creating an elastic barrier.
It's important to choose a sealant that stays elastic after drying and doesn't crack on the folds. PVC boat is a dynamic design that constantly changes its geometry during pumping and operation. A hard sealant will quickly lose integrity. Apply it comfortably from a syringe or a special gun, immediately smoothing it with a finger moistened in soap solution to get a smooth seam.
Finishing also involves checking all corners and endings of stringers. Aluminum profile sharp edges, if they protrude beyond the gluing, it is advisable to grind or close with plastic plugs so as not to hurt yourself and damage other things in the boat.
| Work phase | Material/Tool | Drying time/Waiting time | Critical moments |
|---|---|---|---|
| Degreasing | Acetone, rags. | 5-10 minutes | Do not touch your hands after cleaning |
| Applying glue | Polyurethane glue, brush | 15-20 minutes between layers | Uniform layer without gaps |
| Sleijka | roller | Instantly. | Careful rolling from the centre |
| Fixation | Cargo, scabkins | 12:24 hours. | Avoid shifting the profile |
Typical errors and ways to fix them
Even experienced craftsmen sometimes make mistakes, let alone beginners.